The 80% TB problem is a myth. Most loggers show voltage with a 0-5V spread. The factory TPS only registers a max of 4.2-4.5V, so people are seeing roughly 80% with their loggers, and thinking there is a problem. The UTEC lets the user set the min and max values, so TPS % will be accurate. Same thing with the EU.

 

going to go look through the UK service manual now... should be there I'd hope...


I found in the Uk service manual, the ECU chapter but I'll have to email it to you as I have no idea how to just save one page of a pdf file... tried but unsuccessfully


The recommendations would be very welcome, at least I'd have a starting point

 

Because the feature for raising the rev limiter and removing the speed limiter cannot be used on the 05-06's at this time. Those feature on the UTEC only work for the 03-04 models. Believe me when I say that for $1100 for the reflash and UTEC install I got a Hell of a deal. Contray to what you all might think, It was worth not having to wait for TurboXS to release an update for the 05+ to have it done now.

 

OK seems like the Utec can do everything a reflash can for 03-04 models. I have 2004 g35 coupe, i was wondering is this the same for the 2004 g35 coupe as well? Is there anything utec can do for the 03 04 350z that it cant for the 04 g35 or its the same exact thing? Also would any tuner familiar with the utec for the subaru and evos, automatically be able to tune the utec for us or is it different?

 

Ah I see..You could have waited and got the updated software for free when TX releases it..The whole rev limiter thing is a bit scary on stock internals and heads IMO, even on a N/A car.Over revving an engine can lead to rod failure as well as floating valves and spun bearings, just be careful with that feature..As far as the top speed limiter, I can honestly say that is one feature I never plan on utilizing on a public road..The fastest I took my Z was 143mph when it was bone stock, and that was scary for me. Im jsut a big puss..

 

Can the UTEC advance the cam timing? I already have mine done in the TS reflash the I have had way before the UTEC or other options came out, but the cam timing adjustment really made a difference on my car and with a UTEC tune would make an even bigger difference. This could be another reason for a reflash if you wanted. I can't wait to get the UTEC installed and the car tuned when winter is over.

 

unless you have the VTC pullies from NISMO there is no way you have your cam timing advanced. The UTEC will be able to control these as a future software upgrade, and we will be working with TXS directly with a variety of settings/tunes with the NISMO pullies

 

Yes, TS does some manipulation through the ECU and yes I have settinhgs in my reflash for the JWT cams and have for a while. TS is the only place I know that has this figured out. It can also be done with the Motec standalone. There has been a fair amount of work done with this to see what kind of gains could be had. The biggest gains have been seen down low with more aggressive cams which is exciting. The real challenge is tuning A/F and ignition timing after making the cam adjustments in the ECU through a reflash. You pretty much need the car on a dyno as the changes are being made to come close in the tuning.

 

explain it to me...because without the pulley moving (which a stock does not do), there is no way to manipulate the cam timing as far as I can tell

 

huh?

 

If you want specifics then maybe Doug at Crawford or TS can provide you with what you are looking for. All I know is that it can be done and I had my ECU reflashed several times after adjusting the cams and we couldn't get the tune quite right so I have been waiting for a good piggyback to tune A/F and timing to compliment the TS reflash. I know Doug worked with TS quite a bit on this and also had a Motec hooked up for some time playing with different adjustments to see what kind of results could be created.

 

Damn! The way you say it makes me sound like a dumb ***. LOL Yeah... I suppose I could have waited but I figured... "What the hell!" It's only money right?

 

The UTEC cannot currently control cam phasing (which is what zzzya is refering to) , but it eventually will. The stock ECU is already continuously adjusting the phasing on the intake side via oil pressure, and a solenoid. The Rev up motors also have phasing on the exhuast side.

In speaking with other shops using dedicated standalones, there is some serious power to be made with cam phasing on FI cars, but minimal gains with NA cars.

 

The VTC sprockets are purely mechanical & the adustment ( advance retard)
is acheived by oil being directed to either side of a vane inside the sprocket.

The direction of the oil flow is controlled by the VTC solinoid.

The solinoid gets its information from the ECU & it is this information that can be changed by a reflash.

With the stock sprocket there can be no more total advance with a reflash, just the ability to change the rev range where this occurs.

With the Nismo sprocket there is another 10 + deg of total advance available
where there are some big gains to be made in midrange with more aggresive cams

 

I picked up a UTEC from MRC last week and had it tuned over at Turbo XS last night. While the car is still not as strong as I'd like they got all the power out of it that they could and it definitely feels a lot better up top. My car just feels more solid all around now. I didn't get to beat on it too much because my lugs loosened up for whatever reason, but I am satisfied w. the results.
Baseline on there Dynapack: 244 whp (as compared to 247 on AAM's dynojet)
After tune: 257 peek whp

Jermain's car is putting down 305+ on this same dyno so there's your NA Z over 300, and he doesnt have cams yet =).

My mods are: KJR pulley, topsepeed headers, HF cats, invidia catback, AAM plenum spacer, and I too had a reflash previous to this. Next I'm going to ditch the cats and get a compression test to make sure my motors running ok.